The Wheels Mfg PF30 to Shimano Bottom Bracket with ABEC 3 Bearings lets you install your favorite 24mm crankset into that new PF30 frame. Made with Enduro ABEC 3 bearings, high carbon chromium alloy races, and machined aluminum cups, this bottom bracket will keep the cranks turning smoothly mile after mile. A dual silicone seal blocks out particles for a longer overall life. The Wheels Mfg PF30 to Shimano Bottom Bracket with ABEC 3 Bearings is compatible with 24mm spindle cranksets such as Shimano and FSA without any adapters needed. It features an easy to install threaded design that addresses the creaking and bearing alignment issues we've all come to associate with PressFit bottom brackets.